Check the listing for details. AQUANEAT Aquarium Airline Tubing Connector, Fish Tank Air Pump Connector, 40Pcs. Condition: New. Listed at 4.58 USD. 4 kinds Key feature: Non-toxic plastic connector allow you connect two or more air tubing Straight connectors allow you connect two pieces of air tubing, L connectors is perfect for corner T and Y connectors can split your airline tubing to run a second air stone from the same pump, you can also combine two inputs to create one stronger output for use with multi-outlet pumps Fit most air pumps for standard 3/16''air tubing Package includes: 10pcs T connectors 10pcs straight connectors 10pcs Y connectors 10pcs elbow connectors 2 kinds Key feature: Non-toxic plastic connector allows you connect two or more air tubing. Straight connectors allow you connect two pieces of air tubing. T connectors can split your airline tubing to run a second air stone from the same pump, you can also combine two inputs to create one stronger output for use with multi-outlet pumps. Fit most air pumps for standard 3/16''air tubing. Package includes: 20pcs T connectors 20pcs straight connectors